fix(windows): fix installing non-ascii paths and make normalizeBuf generic

[dylan-conway]

What does this PR do?

Fixes installing packages with non-ascii paths.

Comment in libarchive.zig:

// TODO:
// Due to path separator replacement and other copies that happen internally, libarchive changes the
// storage type of paths on windows to wide character strings. Using `archive_entry_pathname` or `archive_entry_pathname_utf8`
// on an wide character string will return null if there are non-ascii characters.
// (this can be seen by installing @fastify/send, which has a path "@fastify\send\test\fixtures\snow ☃")
//
// Ideally, we find a way to tell libarchive to not convert the strings to wide characters and also to not
// replace path separators. We can do both of these with our own normalization and utf8/utf16 string conversion code.

Also makes normalizeBuf and other functions it uses generic, so they can take u8 or u16 slices. In the future we should update more of our string operations to be generic.

How did you verify your code works?

manually tested installing @fastify/send

[paperdave]

yay
generic normalizeBuf

[github-actions]

❌ @dylan-conway 4 files with test failures on bun-darwin-aarch64:

• test/cli/install/registry/bun-install-registry.test.ts 1 failing
• test/cli/test/bun-test.test.ts 2 failing
• test/js/node/watch/fs.watchFile.test.ts 2 failing
• test/js/third_party/webpack/webpack.test.ts 1 failing

View test output

^{#7d678bcc1fb8582555400762be3587a8cefab74d}

[github-actions]

❌ @dylan-conway 3 files with test failures on linux-x64:

• test/cli/test/bun-test.test.ts 1 failing
• test/integration/next/default-pages-dir/test/next-build.test.ts 1 failing
• test/js/third_party/webpack/webpack.test.ts 1 failing

View test output

^{#7d678bcc1fb8582555400762be3587a8cefab74d}

[github-actions]

❌ @dylan-conway 3 files with test failures on linux-x64-baseline:

• test/cli/test/bun-test.test.ts 1 failing
• test/integration/next/default-pages-dir/test/next-build.test.ts 1 failing
• test/js/third_party/webpack/webpack.test.ts 1 failing

View test output

^{#7d678bcc1fb8582555400762be3587a8cefab74d}

[github-actions]

❌ @dylan-conway 5 files with test failures on bun-darwin-x64:

• test/cli/test/bun-test.test.ts 2 failing
• test/js/bun/util/which.test.ts 1 failing
• test/js/node/fs/fs.test.ts 1 failing
• test/js/node/watch/fs.watchFile.test.ts 1 failing
• test/js/third_party/webpack/webpack.test.ts 1 failing

View test output

^{#7d678bcc1fb8582555400762be3587a8cefab74d}

[github-actions]

❌🪟 @dylan-conway, there are 9 test regressions on Windows x86_64

• test\bundler\cli.test.ts
• test\bundler\esbuild\splitting.test.ts
• test\cli\inspect\inspect.test.ts
• test\cli\run\transpiler-cache.test.ts
• test\js\bun\util\bun-file-windows.test.ts
• test\js\node\process\process-args.test.js
• test\js\third_party\postgres\postgres.test.ts
• test\regression\issue\08095.test.ts
• test\transpiler\template-literal.test.ts

Full Test Output